Academic Journal
Pneumatic angle adjustment for magic angle spinning spherical rotors
| Title: | Pneumatic angle adjustment for magic angle spinning spherical rotors |
|---|---|
| Authors: | Thomas M. Osborn Popp, Nicholas H. Alaniva, Ronny Gunzenhauser, Pin-Hui Chen, Chukun Gao, Lauren E. Price, Alexander B. Barnes |
| Source: | Journal of Magnetic Resonance Open, Vol 6, Iss , Pp 100014- (2021) |
| Publisher Information: | Elsevier, 2021. |
| Publication Year: | 2021 |
| Collection: | LCC:Medical physics. Medical radiology. Nuclear medicine LCC:Physics |
| Subject Terms: | Angle adjustment, Spherical rotors, MAS, Pneumatic, NMR hardware, Solid state NMR, Medical physics. Medical radiology. Nuclear medicine, R895-920, Physics, QC1-999 |
| More Details: | Precise alignment of the sample's spinning axis is vital for many magic angle spinning solid state NMR experiments. Spherical rotors are a new paradigm for magic angle spinning NMR, having been demonstrated to spin stably with little risk of rotor crash, but like cylindrical rotors, they have previously only utilized a mechanical adjustment method to set the sample's rotation axis to the magic angle. Here we show that by using a second gas aperture within the stator, a spherical rotor's axis of rotation may be precisely pitched about the magic angle without mechanical adjustment or motion of the stator. The 2H MAS sideband lineshape of the carboxylic acid deuteron resonance in d4-malonic acid is used as a measure of the rotor's absolute deviation above or below the magic angle by comparing the experimental data to simulated lineshapes. We observe a linear, monotonic relationship between the angle adjustment gas flow rate and the rotor's pitch angle, which is also accompanied by an increase in spinning rate. Precise and in operando control of the spinning axis angle is expected to have considerable advantages to future implementation of MAS within narrow-bore magnets, and for variable angle spinning (VAS) and dynamic angle spinning (DAS) experiments. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2666-4410 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2666441021000054; https://doaj.org/toc/2666-4410 |
| DOI: | 10.1016/j.jmro.2021.100014 |
| Access URL: | https://doaj.org/article/3c09931a51d941ec9533c0e5b1f5a735 |
| Accession Number: | edsdoj.3c09931a51d941ec9533c0e5b1f5a735 |
| Database: | Directory of Open Access Journals |
| ISSN: | 26664410 |
|---|---|
| DOI: | 10.1016/j.jmro.2021.100014 |
| Published in: | Journal of Magnetic Resonance Open |
| Language: | English |